Sand trap



Nov. 22, 1927.

' F. G. SITES SAND TRAP lFiled Jan, 25. 1927 Inventar Patented Nov. 22,1,927.

UNITED sr FLORIEN G. srrns, or .BURKBURNETL TEXAS.

SANDy TRAP.

Application mea 'January 25,' 1927. sei-inno. 163,442.

This invention relates to an improved sand trap adapted for use inassociation with anoil well puinp,`and the same is moreV particularlyadapted for connection with the traveling valveofI the working barrel.v

It is well known that the oil passing Yupwardly through the pump,carries with it considerable sand and grit, which particles are undulydetrimental to the packing cups. The result is that the life of thesecups is comparatively short, making replacement necessary at ratherfrequent intervals.

My object is to provide a novel trap construction for automaticallycollecting the sand and separating it from the oil with a view towardreducing wear upon the cups.

The invention is characterized by exceptional simplicity ofconstruction, novel assembly, maintenance of parts and inexpensivenessof manufacture and employment.

In the drawings Y Figure 1 is a broken view showing the completestructure and all parts properly assembled.

Figs. 2, 3 and et are cross sections taken on the lines 2 2, 3-3, and4-4 respectively of Fig. 1.

Referring now to the drawings in detail,

it will be observed that the reference char-v act-er 1 designates alength of tubing which is open and internally screw threaded at itsopposite ends. Tapped into the lower end is a centrally bored iitting 2provided with customary packing cups 3. Cooperating with the inner endof the fitting '2 is a valve seat ring or plate l with which the ballcheck valve 5 cooperates. f

Referring now to the upper end of the construction, it will be notedthat the reference character 6 designates a special end member providedwith a screw kthreaded shank 7 at its upper end for the connect-ion of asuitable operating rod. The lower end of this member 6 is in the form ofa sleeve 8 connected with a tubular coupling 9 which is inturned andthreaded in the upper end of the tube 1. This sleeve 8 is surrounded bypacking rings 10 which surmount collars 10 on the sleeve. Above thepacking rings and in the sleeve 8 are opposite apertures 11. Abovethese, is a bored discharge passage 12 in the member 6 opening into atransverse port 13. This port 13 serves to discharge the oil, from whichthe sand has been extracted, into the working barrel, (not shown). i

At this point, I would call attention to thefact that th'elower end ofthe bore 12 is screw threaded and a pipe section 14 is threadedly`connected, therewith. v.On the lower end` of this pipe sect-ion is acomplemental pipe section 15 carrying packing 1G snugly iitting withinthe'tubing 1 and held in place by retaining nuts. lhese two pipesections are connected together by an appropriate coupling 17. Also asshown better in Fig. 3, the diametrically opposite sides of thefirst-named pipe section 14 are liattened in order to increase the sizeof the spaces between themselves and the inner wall of" the aforesaidsleeve 8.

With the arrangement described, it is obvious that the sand laden fluidenters the cage .equipped litt-ing 2 then passes upwardly and unseatsthe ball check valve 5.

[t then passes upwardly throughthe pipe sections 15 and 11irespectively, and outwardly through the bores 12 and 13, after` whichthe sand passes inwardly through the `apertures 11 and owing to thespaces provided on opposite sides of the upper pipe section bytheflattened side walls, the sand gravitates through-the said spaces andset- `tles in the chamber formed between the packing 16, the tubing 1,and the lower end of the coupling 9. The operation described will bebetter understood when it is stated that the fluid is discharged throughthe apertures or bores 13, strikes the side of the working barrel, notshown, and is deflected downwardly toward the upper packing cup. This'action washes the sand off or from the upper packing cup and through theapertures 11 whereupon the sand is enabled to settle into the sand trapformed between the 1. In a sand trap for oil *welll pumps and `incombination, a tube, a valved fitting carried at the lower end of thetube, an end member carried at the upper end of the tube and having asleeve connected to the tube and also having an upwardly and laterallyextending bore; the upper portion of the sleeve being apertured at apoint spacedbelow said lateral bore, packing on the sleeve below theapertured portion thereof, a pipe carried by the end member inCommunication with the said bore thereof and extending through andspaced from said sleeve, and packing on the pipe and in they tube anddisposed below the said sleeve.

2. In asand trap for oil well pumps and in combination, a tube,v avalved fitting carried at theflower end of the tube, an end member, saidend member having an upwardly and laterally extending bore and alsohaving a sleeve, Said sleeve threaded at its lower end and upertured ata point spaced below the lateral bore7 aeoupling `interposed between andconnecting the upper end` of the tube and the lower end of the sleeve oftheV .end member, packing rings secured on the sleeve of the end member,the upper of said paeking ring being arranged with its upper edge flushwith the aperture in the sleeve, a pipe Connected to the end member andeommunieating vwith the upwardly extending bore thereof and arranged inand spaced from the sleeve, and packing on the said pipe and disposed inthe tube below the said Coupling. t

In testimony whereof I afiix my signature.

i rLoRiEN e. SITES.

